Sift Web Tools
Normalise audio loudness to a broadcast or streaming target, file returned. Linear two-pass EBU R 128 loudness normalisation to a named target (ebu_r128, atsc_a85, ebu_r128_short, podcast, spotify, youtube, apple_music, amazon_music, deezer, aes_streaming, audiobook_acx) or custom lufs/true_peak. Returns the corrected file (wav, wav16, flac, mp3, m4a, opus) with before/after figures in X-Loudness-Report.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.02 USDC on Base to 0x33d2…AFa0d. The signed payment is good for 5 minutes.
- Paid to
- 0x33d2…AFa0d
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 8mAMFG…LvJb7
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x33d25C0A915e1114B341d09a7Cf7CEcaB60AFa0d",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
},
"payTo": "8mAMFGi95QPiSjuenVdYGYSLcz5bviqLotaQ83cLvJb7",
"amount": "20000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"url": "https://sift.srv1996466.hstgr.cloud/samples/tone.mp3"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"description": "Audio file URL"
},
"lufs": {
"type": "number",
"description": "Custom integrated loudness, -40 to -5"
},
"format": {
"type": "string",
"description": "wav, wav16, flac, mp3, m4a or opus (default mp3)"
},
"target": {
"type": "string",
"description": "Named target (default podcast)"
},
"true_peak": {
"type": "number",
"description": "Custom true peak dBTP, -9 to 0"
}
}
}
},
"additionalProperties": false
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-19 19:52Z
- Last indexed by Roundhouse
- 2026-10-26 20:10Z
- Last enriched (probe, favicon, geo)
- 2026-10-18 17:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Sift Web Tools and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Sift%20Web%20Tools' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://sift.srv1996466.hstgr.cloud/v1/audio/normalize, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.